loplugin:simplifyconstruct (--with-webdav=serf)

Change-Id: I3a52b0e2517cfd88f661dde2b01b2e6bc6913ba2
Reviewed-on: https://gerrit.libreoffice.org/60927
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

ucb/source/ucp/webdav/DAVResourceAccess.hxx

@@ -53,7 +53,7 @@ class DAVResourceAccess
     std::vector< SerfUri > m_aRedirectURIs;
 
 public:
-    DAVResourceAccess() : m_xSessionFactory( nullptr ) {}
+    DAVResourceAccess() = default;
     DAVResourceAccess( const css::uno::Reference< css::uno::XComponentContext > & rContext,
                        rtl::Reference< DAVSessionFactory > const & rSessionFactory,
                        const OUString & rURL );